Echinorhynchus species are acanthocephalan parasites belonging to the family Echinorhynchidae. Like other acanthocephalans we’ve already seen (e.g. Neoechinorhynchus emyditoides; Moniliformis moniliformis; Pseudocorynosoma constrictum, these thorny headed worms parasitize the intestines of fish and amphibians. The species shown here is probably Echinorhnychus salmonis, an acanthocephalan with a Holarctic distribution, occurring in fresh and brackish waters and commonly parasitizing salmoniform and other fishes (intermediate hosts include amphipods such as Monoporeia affinis). Echinorhynchus are often the topic of research projects including effects on host feeding ecology, anti-predator behavior, and host spawning. Here are two links about Echinorhynchus species:
Contributed by Jessica Light.